Thanks for the welcome. After a couple of months with my system, I can enthusiastically say it's great to be an Aperion owner. Absolutely love my gear. Absolutely loved interfacing with your company, etc, etc.
The difficulty was the stand manufacturer advised putting the sand in a 4 mil thick plastic bag. Given the shape of the channel, there was no way to find something that size and thickness. If I could have gotten ahold of an elephant condom it probably would have worked. But how can you ask around for an elephant condom? I like elephants but I don't want anyone thinking I love them . I could have tailored something but the problem is I have a life. So I doubled a couple of trash can liners and dumped in the sand. If it holds, easy solution. If it doesn't, hopefully sand all over the family room won't really bother my wife.
The important thing is I have the peace of mind of knowing I did absolutely everything possible to defend the full capabilities of my Aperion 5D-s. Thanks for your input.